<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
<!--    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>-->
    <script src="Vue.js"></script>
</head>
<body>

<div id="app">
<input type="text" v-model="title">{{title}}
    <br>
    <input type="text" v-model="">
</div>

</body>
<script>
new Vue({
    el:"#app",
    data:{
        title:"哦哦",
        sum:"0"
    },
    methods:{
increase:function (s){
    this.sum+=1;
}
    }

})
</script>
</html>